The idea would be for the Hydrogen extraction from oil and bitumen would be controlled enough to maintain the power demands of the engine. That way it keeps the level of hydrogen available down to where any accident does not create catastrophe. If the mechanism for such extraction was miniaturized in a small device, it may even lower the weight of a vehicle.
Sounds good to me. Does bring up a great opportunity too. There is going to be a big market for the trailers of oil sands you will have to tow behind the car to keep it running.
Invest in trailer manufacturers.